Answered step by step
Verified Expert Solution
Link Copied!

Question

1 Approved Answer

QUESTION 8 FENCE Bob owns a business which makes fence posts. The length of these posts can be thought of as a random variable. When

image text in transcribedimage text in transcribed
QUESTION 8 FENCE Bob owns a business which makes fence posts. The length of these posts can be thought of as a random variable. When Bob's machines are calibrated correctly, the fence posts are produced with an average length of 250 cm and a standard deviation of 0.4 cm. The lengths ofthe individual fence posts are normally distributed. FENCE. What is the probability that an individual fence post is longer than 250.5 cm? A About 10.6% 'A About 39.4% A The answer cannot be calculated with the information given. 'A None of the above. QUESTION 9 FENCE Bob owns a business which makes fence posts. The length of these posts can be thought of as a random variable. When Bob's machines are calibrated correctly, the fence posts are produced with an average length of 250 cm and a standard deviation of 0.4 cm. The lengths ofthe individual fence posts are normally distributed. FENCE. Suppose a random sample of 49 fence posts is taken. What is the probability that the sample mean is longer than 250.5 cm? A About 100% A About 0% A The answer cannot be calculated with the information given. A None of the above. 1 points 1 points Save Answer Save Answer QUESTION 10 1 points Save Answer FENCE Bob owns a business which makes fence posts. The length of these posts can be thought of as a random variable. When Bob's machines are calibrated correctly, the fence posts are produced with an average length of 250 cm and a standard deviation of 0.4 cm. The lengths of the individual fence posts are normally distributed. FENCE. Suppose the length of the fence posts was not normally distributed. If you took a random sample of 49 fence posts, could you use the Z table to to calculate probabilities for the sample mean? O No. The fence posts must be normally distributed. No. We must use the t distribution instead. Yes but the calculation will not be very accurate. None of the above

Step by Step Solution

There are 3 Steps involved in it

Step: 1

blur-text-image

Get Instant Access to Expert-Tailored Solutions

See step-by-step solutions with expert insights and AI powered tools for academic success

Step: 2

blur-text-image

Step: 3

blur-text-image

Ace Your Homework with AI

Get the answers you need in no time with our AI-driven, step-by-step assistance

Get Started

Recommended Textbook for

More Books

Students also viewed these Economics questions

Question

Why should goals be specific and measurable?

Answered: 1 week ago